progress: Terminal Progress Bars

Version 1.1.2

Configurable Progress bars, they may include percentage,
elapsed time, and/or the estimated completion time. They work in
terminals, in 'Emacs' 'ESS', 'RStudio', 'Windows' 'Rgui' and the
'macOS' 'R.app'. The package also provides a 'C++' 'API', that works
with or without 'Rcpp'.